Second, it’s my understanding based on this article an a couple of others that the church didn’t put their name or logo on the flyer, nor was it decorated with any crosses or other religious symbols.

If in good faith it is not an attempt to proselytize, I see no issue with this. This would be nothing more than cultural sharing and there should never be an issue with cultural exchange.

“It really bothered my two kids,” said parent Majed Moughni, who is Muslim and has two children, ages 7 and 9, in Dearborn elementary schools. “My son was like, ‘Dad, I really don’t feel comfortable getting these flyers, telling me to go to church. I thought churches are not supposed to mix with schools.’ “

I think how a parent approaches this issue is important - as an atheist - i have been in this position before.

If the parent and the child have a healthy understanding of religion and tolerance, exposure to other religions, when they are not attempting to proselytize is a healthy, educational experience. However, I have also found myself on the other side - “have you accepted Jesus Christ as your personal saviour?” - in these circumstances, politely remarking “indeed, along with danger mouse, chibi maru, and Boudicca, - have you heard of Boudicca? would you like to come over and attend a ritual we have in her honor?” usually does the trick.